Viessmann Vitopend 100-W Installation And Service Instructions Manual page 16

Commissioning, inspection, maintenance
Further details regarding the individual steps
Operation with LPG
Flush the LPG tank twice during com-
missioning or replacement. Vent the tank
and gas supply line thoroughly after
flushing.
1. Close the gas shut-off valve.
2.
Release screw inside test nipple A
on the gas train, but do not remove it;
then connect the pressure gauge.
3. Open the gas shut-off valve.
4. Test the static pressure and record it
in the "Reports" table.
Set value: max. 57.5 mbar
5. Start the boiler.
Note
During commissioning, the boiler can
enter a fault state because of airlocks
in the gas line.
To reset, switch OFF the ON/OFF
switch on the control unit and switch
ON again after approx. 3 s. The igni-
tion process will then be repeated.
16
(cont.)
6. Check the supply (flow) pressure.
Set value:
■ Natural gas: 20/25 mbar
■ LPG: 28/30/37/50 mbar
Note
Use a suitable measuring device with
a resolution of at least 0.1 mbar to
check the supply pressure.
7. Record the actual value in the
"Reports" table.
Take the action shown in the follow-
ing table.
8. Switch OFF the system at the control
unit (the boiler shuts down), close the
gas shut-off valve, remove the pres-
sure gauge and close test nipple A
with the screw.
9. Open the gas shut-off valve and start
the appliance.
Danger
Gas escaping from the test
nipple leads to a risk of explo-
sion.
Check the test nipple for gas
tightness.